View inside the Vickers-Vimy-Commercial exhibited on the stand of Ateliers des Mureaux. The machine, which has been purchased for use by the Grands Express Aeriens, is richly finished in leather repousse work

THE PARNALL "PUFFIN": Front view of the machine with wings folded. The large angle of the planes when folded is due to the pronounced stagger. Note the amphibian gear working in a slot in the main float.

THE HANDLEY PAGE SLOTTED WING TESTED AS A MONOPLANE: 1. The complete machine. 2. Slot closed and aileron normal. 3. Slot open and aileron normal. 4. Slot open and aileron down.The photographs show a Handley Page slotted wing mounted on the fuselage of a D.H.9A. The machine is comparatively crudely made, but it has served to demonstrate that the scale effect is normal for a slotted wing, and also that the slotted ailerons fitted are effective up to the angle of maximum lift. A more refined machine is now being built, and the full-scale experiments will then be continued with the latest forms of slots.

The Cabin of the "Bristol" Ten-Seater: Although not including all the seats, this photograph gives an excellent idea of the roominess of the cabin and of the good view obtained through its windows. The machine, which has a 450 h.p. Napier "Lion" engine, was fully described in our issue of July 7, 1921.

A FAIREY AMPHIBIAN: The photograph of the machine just after alighting shows the trailing edge of the wings pulled down to give greater lift. This hinged trailing edge is a feature of all Fairey seaplanes.

The British Deutsch Cup Challenger: The Mars I, designed by Mr. H. P. Folland and built by the Gloucestershire Aircraft Co. of Cheltenham, was fitted while at Etampes with Lamblin radiators. The result was an increase in speed of several miles per hour, and but for the fabric stitching failing, this machine would undoubtedly have given an excellent account of itself in the race. Incidentally, what about adapting this type of machine for military purposes? With slightly larger wings, so as to improve the climb and reduce the landing speed, it should prove a formidable rival to existing types.

THE WESTLAND "WALRUS" FLEET SPOTTER: Three-quarter rear view. The projection under the fuselage is a chamber in which the observer can lie down so as to get an uninterrupted view of a wide area of the sea.

MARTINSYDES FOR SPAIN: One of Martinsyde F.4a (300 h.p. Hispano) two-seater biplanes recently supplied to the Spanish Government. A representative of the Spanish Government was at Brooklands, and made a trip in each of the machines before taking delivery.